<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>这是页面标题</title>
</head>
<body>

    <p>这是段落标签</p>
    这是换行标签<br>换行标签比段落标签的行间距小
</body>
</html>